module pp4_2Adder (
    input [25:0] in1,
    input [25:0] in2,
    input [25:0] in3,
    input [25:0] in4,
    output [25:0] C,
    output [25:0] S
);
    genvar i;
    generate
        for (i = 0;i<26 ;i=i+1 ) begin
            compressor4_2 u_compressor4_2(
    .in1(in1[i]),
    .in2(in2[i]),
    .in3(in3[i]),
    .in4(in4[i]),
    .cin(),
    .cout(),
    .C(C[i]),
    .S(S[i])
);
        end
    endgenerate
endmodule